Powerful narcissists (ahem) tend towards overconfidence.

In this study (that couldn’t possibly have been inspired by recent political events*), scientists from the University of Georgia report that that power and narcissism lead to overconfidence. To test this idea, they conducted a series of four experiments in which participants were evaluated for narcissism, quizzed with trivia questions, and then assessed by how many they thought they got right. In one experiment, the researchers had participants write about a life event in which they either h